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21031 (1989 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2021031
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2320307484504995 5.8722e-08  
a 2.309778622189595 1.5151e-08 AU
q 1.77383895972798 1.3821e-07 AU
i 2.57939630439033 9.4553e-06 deg
node 199.4875216539142 0.00012263 deg
peri 221.2585814501984 0.00012501 deg
M 333.6339951875017 2.4572e-05 deg
tp 2456894.406529218470
(2014-Aug-24.90652922)
8.8046e-05 JED
period 1282.194657820287
3.51
1.2616e-05
3.454e-08
d
yr
n .2807686007770419 2.7626e-09 deg/d
Q 2.84571828465121 1.8667e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      610  
   data-arc span      8258 days (22.61 yr)  
   first obs. used      1989-10-03  
   last obs. used      2012-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55054  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:53:13  

Additional Information
 Earth MOID = .786428 AU 
 T_jup = 3.548 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6 mag n/a MPO231562  

21031 (1989 TO15)          Discovered 1989-Oct-03 by Debehogne, H. at La Silla (809)
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TO15 = 1994 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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